I'm making my first yeast starter right now. Mixed 2 oz DME with 500ml water, heated it up in a pot for 5 minutes and stirred, then added to Erlenmeyer flask, boiled for 15-20 minutes. It's now cooling down and there is a noticeable amount of DME on the bottom of the flask, as if it didn't mix well. Is this just "cold break" or something?

I tried looking this up, but couldn't find any information on it. I'm asking because I can easily just use the XL smack pack by itself tomorrow if this sounds strange.